Good point. The first Sonic 1 commercial only said "Sonic the Hedgehog". Do we have any way of knowing when the second version aired? The whole exchange wouldn't make sense if the entirety of what he said was conjecture. The skinny is that there was some kind of legal issue, he wasn't aware of the full details, and Sega were maybe being overcautious. In the interview, that was the first thing he said about the game, unprompted. There's really no reason not to believe him. Did Sega have many console-to-arcade ports in the '80s? The only one I can think of is Champion Boxing (Yoshiki Kawasaki said that the SG-1000 version was developed first, but the arcade version may have been released first). In general, Sega's console-born IPs didn't make the leap to arcades, so it was a pretty big deal when Sonic did.